Some people don't know how to do what they are told; they have not been used to it, and they neither understand quickly nor are able to turn what they do understand into action quickly. With an obedient mind one learns the rights of things fast enough; for it is the law of the universe, and to obey is to understand.
 George MacDonald, At the Back of the North Wind (1871). copy citation

Context

“and Diamond did mind the gate, and guided the nameless horse through it in safety, pulling him this way and that according as was necessary. Diamond learned to drive all the sooner that he had been accustomed to do what he was told, and could obey the smallest hint in a moment. Nothing helps one to get on like that. Some people don't know how to do what they are told; they have not been used to it, and they neither understand quickly nor are able to turn what they do understand into action quickly. With an obedient mind one learns the rights of things fast enough; for it is the law of the universe, and to obey is to understand. “Look out!” cried Mr. Stonecrop, as they were turning the corner into Bloomsbury Square. It was getting dusky now. A cab was approaching rather rapidly from the opposite direction, and Diamond pulling aside, and the other driver pulling up, they only just escaped a collision.” source